Chemical detergent block



FIG. 1 is a perspective view of a chemical detergent block showing our new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a side elevational view thereof all other sides being mirror images of that shown.

The bottom is flat and unornamented. 

The ornamental design for a chemical detergent block, as shown and described. 